JPH0634323B2 - Disco Cartridge - Google Patents
Disco CartridgeInfo
- Publication number
- JPH0634323B2 JPH0634323B2 JP60211976A JP21197685A JPH0634323B2 JP H0634323 B2 JPH0634323 B2 JP H0634323B2 JP 60211976 A JP60211976 A JP 60211976A JP 21197685 A JP21197685 A JP 21197685A JP H0634323 B2 JPH0634323 B2 JP H0634323B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- cartridge
- disk
- recording medium
- central
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 241001050985 Disco Species 0.000 title 1
- 238000003780 insertion Methods 0.000 claims abstract description 8
- 230000037431 insertion Effects 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims description 19
- 230000004075 alteration Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
- G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
- G11B23/0028—Details
- G11B23/0035—Details means incorporated in the disc, e.g. hub, to enable its guiding, loading or driving
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/03—Containers for flat record carriers
- G11B23/033—Containers for flat record carriers for flexible discs
- G11B23/0332—Containers for flat record carriers for flexible discs for single discs, e.g. envelopes
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、例えば、直径３．５インチの磁気シートを用
いるマイクロ・フロツピーデイスクを用いるデイスクカ
ートリツジに適用するのに最適なものであつて、シート
状記録媒体を中心円板の外周に固着して、カートリツジ
内に回転自在に収納してあるデイスクカートリツジに関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is most suitable for application to a disk cartridge using a micro floppy disk, for example, which uses a magnetic sheet having a diameter of 3.5 inches. Thus, the present invention relates to a disk cartridge in which a sheet-shaped recording medium is fixedly attached to the outer periphery of a central disk and is rotatably housed in the cartridge.
本発明は、ほゞ正方形状の中心孔とほゞ長方形状の偏心
孔とを有する中心円板の外周にシート状記録媒体を固着
し、このシート状記録媒体を上下ハーフからなるカート
リツジ内に回転自在に収納させ、中心円板を下ハーフに
設けたターンテーブル挿入孔内に遊嵌させてあるデイス
クカートリツジにおいて、カートリツジ内でのシート状
記録媒体の位置決め（センターリング）を中心円板の内
周側で行うように構成することにより、中心円板の外径
を大巾に縮小して、記録、再生時のトラツキングずれ等
を極力防止できるようにしたものである。According to the present invention, a sheet-shaped recording medium is fixed to the outer periphery of a central disc having a substantially square-shaped central hole and a substantially rectangular-shaped eccentric hole, and the sheet-shaped recording medium is rotated in a cartridge which is composed of upper and lower halves. In a disc cartridge that is freely accommodated and the center disk is loosely fitted in the turntable insertion hole provided in the lower half, the positioning (centering) of the sheet-shaped recording medium in the cartridge is determined by the center disk. By being configured so as to be performed on the circumferential side, the outer diameter of the central disk can be greatly reduced to prevent tracking deviation and the like during recording and reproduction as much as possible.
第３図〜第５図によつてマイクロ・フロッピーデイスク
を用いるデイスクカートリツジとその回転駆動装置の従
来例を説明する。A conventional example of a disk cartridge using a micro-floppy disk and its rotary drive device will be described with reference to FIGS.
先ず、第３図及び第４図に示す如く、マイクロ・フロツ
ピーデイスク（以下単にデイスクと記載する）１はステ
ンレス板等の金属の中心円板２の外周にシート状記録媒
体である直径３．５インチの磁気シート３を固着したも
のであり、中心円板２にはほゞ正方形状の中心孔４とほ
ゞ長方形状の偏心孔５とが互いに所定角度に傾斜されて
設けられている。そしてこのデイスク１は合成樹脂にて
成形された上下ハーフ６、７からなるカートリツジ７内
に回転自在に収納され、中心円板２は下ハーフ７の中央
部に設けられたターンテーブル挿入孔９内に遊嵌されて
いる。また磁気シート３の半径方向に沿つて上下ハーフ
６、７に設けられた上下一対のヘツド挿入孔１０がシヤ
ツター１１によつて開閉されるように構成されている。First, as shown in FIGS. 3 and 4, a micro-floppy disc (hereinafter, simply referred to as a disc) 1 has a diameter of a sheet-shaped recording medium 3. A 5-inch magnetic sheet 3 is fixed, and a central disk 2 is provided with a substantially square-shaped central hole 4 and a substantially rectangular-shaped eccentric hole 5 which are inclined at a predetermined angle. The disk 1 is rotatably housed in a cartridge 7 composed of upper and lower halves 6 and 7 made of synthetic resin, and a central disc 2 is provided in a turntable insertion hole 9 provided in a central portion of the lower half 7. Is loosely fitted to. Further, a pair of upper and lower head insertion holes 10 provided in the upper and lower halves 6 and 7 along the radial direction of the magnetic sheet 3 are configured to be opened and closed by a shutter 11.
一方、回転駆動装置はデイスクプレーヤ（図示せず）内
に配置されていて、モータ１３のモータ軸１４の上端に
固着されて水平に回転駆動されるターンテーブル１５に
よつて構成されている。なおターンテーブル１５の上面
上にはヨーク板１６とマグネツト板１７等にて構成され
たマグネツトチヤツク１８がスペーサ１９を介して複数
のビス２０によりビス止めされており、かつマグネツト
チヤツク１８の上面の中央には非磁性材からなる薄い滑
性シート２１が接着されている。そしてマグネツトチヤ
ツク１８の中心の上部にはモータ軸１４の上端によつて
構成された中心ピン２２が突出して設けられ、その偏心
位置には駆動ピン２３が設けられている。なお駆動ピン
２３はマグネツト板１７とスペーサ１９との間にサンド
イツチ状に共締めされた板ばね２４に取付けられてマグ
ネツトチヤツク１８に設けられた貫通孔２５を貫通して
上方に突出されている。On the other hand, the rotary drive device is arranged in a disk player (not shown), and is constituted by a turntable 15 fixed to the upper end of the motor shaft 14 of the motor 13 and driven to rotate horizontally. A magnet chuck 18 composed of a yoke plate 16 and a magnet plate 17 is screwed onto the upper surface of the turntable 15 by a plurality of screws 20 via a spacer 19, and the upper surface of the magnet chuck 18 is fixed. A thin slip sheet 21 made of a non-magnetic material is adhered to the center of the. Further, a center pin 22 formed by the upper end of the motor shaft 14 is provided so as to project above the center of the magnet chuck 18, and a drive pin 23 is provided at an eccentric position thereof. The drive pin 23 is attached to a leaf spring 24 that is fastened together in a sun-detent shape between the magnet plate 17 and the spacer 19, and penetrates through a through hole 25 provided in the magnet chuck 18 and is projected upward. .
そして、第３図に示す如くシヤツター１１を開蓋させた
状態でカートリツジ８をターンテーブル１５上に水平に
装着すると、第４図に示す如くターンテーブル挿入孔９
内にマグネツトチヤツク１８が挿入されて、そのマグネ
ツトチヤツク１８の磁気吸引力によつてデイスク１の中
心円板２が滑性シート２１上に水平に吸着されると共
に、中心円板２の中心孔４と偏心孔５とがターンテーブ
ル１５の中心ピン２２と駆動ピン２３とに挿入される。
また第５図に示す如く上下一対の磁気ヘツド２６、２７
が上下一対のヘツド挿入孔９内に挿入されて、これら両
磁気ヘツド２６、２７がデイスク１の磁気シート３の上
下両面に接触される。そしてこのデイスク装着後にモー
タ１３によりターンテーブル１５を回転駆動して、中心
ピン２２にて中心円板２の中心を位置決めした状態で駆
動ピン２３にて中心円板２を回転駆動することにより、
磁気シート３をカートリツジ８内で水平に回転させる一
方、両磁気ヘツド２６、２７を磁気シート３の半径方向
に移動させて、その磁気シート３の上下面の一方を選択
的に磁気記録、再生するように構成されている。Then, as shown in FIG. 3, when the cartridge 8 is horizontally mounted on the turntable 15 with the shutter 11 opened, as shown in FIG.
The magnetic chuck 18 is inserted into the inside, and the central disk 2 of the disk 1 is horizontally attracted onto the sliding sheet 21 by the magnetic attraction force of the magnetic chuck 18, and the center of the central disk 2 is absorbed. The hole 4 and the eccentric hole 5 are inserted into the center pin 22 and the drive pin 23 of the turntable 15.
Further, as shown in FIG. 5, a pair of upper and lower magnetic heads 26, 27
Is inserted into a pair of upper and lower head insertion holes 9 so that both magnetic heads 26 and 27 are brought into contact with both upper and lower surfaces of the magnetic sheet 3 of the disk 1. Then, after the disk is mounted, the turntable 15 is rotationally driven by the motor 13 and the central pin 2 is rotationally driven by the drive pin 23 while the center of the central disc 2 is positioned by the central pin 22.
While rotating the magnetic sheet 3 horizontally in the cartridge 8, both magnetic heads 26 and 27 are moved in the radial direction of the magnetic sheet 3 to selectively magnetically record and reproduce one of the upper and lower surfaces of the magnetic sheet 3. Is configured.
ところで従来は、第５図に示す如く、中心円板２をプレ
ス加工してその外周に断面ほゞＬ形に形成された円筒部
２８とフランジ２９とを一体に設け、磁気シート３の中
央に設けた円形孔３０を円筒部２８の外周に下方から嵌
合させて、中心円板２に対する磁気シート３のセンター
出しを行つた状態で、磁気シート３の円形孔周辺部分３
ａをフランジ２９の下面に接着剤３１によつて接着して
いた。By the way, conventionally, as shown in FIG. 5, the central disk 2 is press-worked to integrally provide a cylindrical portion 28 and a flange 29, each of which has a substantially L-shaped cross section, on the outer periphery thereof, and which is provided at the center of the magnetic sheet 3. The circular hole 30 provided is fitted to the outer periphery of the cylindrical portion 28 from below, and the magnetic sheet 3 is centered with respect to the central disk 2.
The a was adhered to the lower surface of the flange 29 with the adhesive 31.
また従来は、第５図に示す如く、上ハーフ６の内面の中
央部に一体成形した円筒状をなす大径Ｄ１の位置決め用
リブ３２を中心円板２の円筒部２８の内周に嵌合させ
て、カートリツジ８内での磁気シート３の位置決め（カ
ートリツジ８内で磁気シート３が水平方向に一定以上に
大きく移動して、その磁気シート３の外周がカートリツ
ジ８の周壁の内面に当接されて損傷されてしまわないよ
うにセンターリングを行うための構造）を行つていた。
なお第５図に示す滑性シート３３は上ハーフ６の中心の
内面に接着されたものであつて、ターンテーブル１５の
中心ピン２２の上端が接触されるものである。Further, conventionally, as shown in FIG. 5, a positioning rib 32 having a large diameter D 1 and having a cylindrical shape integrally formed in the central portion of the inner surface of the upper half 6 is fitted on the inner circumference of the cylindrical portion 28 of the central disc 2. And the positioning of the magnetic sheet 3 in the cartridge 8 (the magnetic sheet 3 moves horizontally in the cartridge 8 by a certain amount or more, and the outer periphery of the magnetic sheet 3 contacts the inner surface of the peripheral wall of the cartridge 8). Structure for centering so that it would not be damaged.
The slippery sheet 33 shown in FIG. 5 is adhered to the inner surface of the center of the upper half 6, and the upper end of the center pin 22 of the turntable 15 is in contact therewith.
第７図に示す如く、磁気シート３の円形孔周辺部分３ａ
を中心円板２のフランジ２９の下面に接着している接着
剤３１の厚みのバラツキ等によつて、磁気シート３の円
形孔周辺部分３ａの下面が３ｂと、磁気シート３の高さ
の基準となる下部磁気ヘツド２７の上面２７ａとの間に
段差Ｈ１が発生すると、磁気シート３を下部磁気ヘツド
２７の上面２７ａに完全な水平状態に接触させることが
できず、磁気シート３に半径方向における上下の撓みが
発生して、磁気シート３に対する両磁気ヘツド２６、２
７の当り（接触状態）が悪くなつてしまう。しかしてこ
の当りの問題は、磁気シート３の最内周を記録、再生す
べく両磁気ヘツド２６、２７が最内周位置Ｐ１へ移動さ
れた時に最も深刻な問題となる。As shown in FIG. 7, the circular hole peripheral portion 3a of the magnetic sheet 3 is formed.
Due to variations in the thickness of the adhesive 31 adhered to the lower surface of the flange 29 of the center disk 2, the lower surface of the circular hole peripheral portion 3a of the magnetic sheet 3 is 3b, and the height of the magnetic sheet 3 is a reference value. When the step H 1 is generated between the upper surface 27a of the lower magnetic head 27 and the upper surface 27a of the lower magnetic head 27, the magnetic sheet 3 cannot be brought into contact with the upper surface 27a of the lower magnetic head 27 in a completely horizontal state, and the magnetic sheet 3 moves in the radial direction. The upper and lower flexures of the magnetic sheets 26, 2
The hit (contact state) of 7 becomes worse. However, the hitting problem becomes the most serious problem when both magnetic heads 26 and 27 are moved to the innermost circumference position P 1 to record and reproduce the innermost circumference of the magnetic sheet 3.
即ち、磁気シート３の円形孔周辺部分３ａは中心円板２
のフランジ２９の下面に接着されて固定されているため
に、磁気シート３の内周側は外周側に比べて柔軟性が乏
しく撓み難いために、両磁気ヘッド２６、２７が最内周
位置Ｐ１へ移動された時に、上記当りが最も悪くなる。
なおこの当りが悪いと、トラツキングずれやスペーシン
グロス等の問題を発生し、特に１ＭＢ用（標準記録用）
に比べて２ＭＢ用（高密度記録用）では重大である。That is, the peripheral portion 3a of the circular hole of the magnetic sheet 3 is the central disc 2
Since the magnetic sheet 3 is adhered and fixed to the lower surface of the flange 29, the inner peripheral side of the magnetic sheet 3 is less flexible than the outer peripheral side and is hard to bend. When it is moved to 1 , the above hit is the worst.
If this hit is not good, problems such as tracking deviation and spacing loss will occur, especially for 1MB (for standard recording).
2MB (for high-density recording) is more important than
しかしてこの際、中心円板２の外径Ｄ２を磁気シート３
の外径（３．５インチ）Ｄ３に対して充分に小さく構成
することができれば、中心円板２のフランジ２９の下面
に接着されて固定されている磁気シート３の円形孔周辺
部分３ａにおける固定部分の外径位置Ｐ２と、両磁気ヘ
ツド２６、２７の最内周位置Ｐ１との間に充分な距離ｌ
１を取つて上記当りを良くすることができるが、単純に
は中心円板２のフランジ２９の外径Ｄ２を小さくするこ
とができない。However, at this time, the outer diameter D 2 of the central disk 2 is set to the magnetic sheet 3
If it can be configured to be sufficiently smaller than the outer diameter (3.5 inches) D 3 of the magnetic disk 3, the circular hole peripheral portion 3a of the magnetic sheet 3 adhered and fixed to the lower surface of the flange 29 of the central disk 2 is fixed. A sufficient distance l is provided between the outer diameter position P 2 of the fixed portion and the innermost peripheral position P 1 of both magnetic heads 26, 27.
Although it is possible to improve the connexion per the preparative 1, simply can not reduce the outer diameter D 2 of the flange 29 of the central disc 2.
つまり従来は、上ハーフ６の内面に一体成形した大径Ｄ
１の位置決め用リブ３２で中心円板２の外周の円筒部２
８を内側から位置決めするようにして、中心円板２の外
周側での位置決め構造によつて、カートリツジ８内での
磁気シート３の位置決め（センターリング）を行つてい
たので、中心円板２の外径Ｄ２を一定以下に小さくする
ことが非常に困難な構造になつており、中心円板２の外
径Ｄ２は磁気シート３の外径Ｄ３に対して比較的大きな
直径になつていた。That is, conventionally, a large diameter D integrally formed on the inner surface of the upper half 6 is used.
The cylindrical rib 2 on the outer periphery of the central disc 2 with the positioning rib 32 of 1.
Since the magnetic disk 3 is positioned from the inside by the positioning structure on the outer peripheral side of the central disk 2, the magnetic sheet 3 is positioned (centered) in the cartridge 8 so that the central disk 2 It is very difficult to reduce the outer diameter D 2 of the magnetic disk 3 to a certain value or less, and the outer diameter D 2 of the central disk 2 becomes relatively larger than the outer diameter D 3 of the magnetic sheet 3. Was there.
本発明は、磁気シート等のシート状記録媒体の外径に対
する中心円板の外径を充分に小さく構成することができ
るようにするものである。The present invention enables the outer diameter of the central disk to be made sufficiently smaller than the outer diameter of a sheet-shaped recording medium such as a magnetic sheet.
本発明は、前述したデイスクカートリツジにおいて、前
記中心円板の上面で前記ほゞ正方形状の中心孔の外周に
同心円形状の小径のリングを一体に設け、上記上ハーフ
の内面に一体成形した小径の位置決め用リブを前記リン
グの外周に嵌合させて、前記カートリツジ内での前記磁
気シート等のシート状記録媒体の位置決めを前記中心円
板の内周側で行うように構成したものである。According to the present invention, in the above-described disk cartridge, a concentric small-diameter ring is integrally provided on the outer periphery of the substantially square center hole on the upper surface of the central disc, and a small diameter integrally formed on the inner surface of the upper half. The positioning rib is fitted to the outer circumference of the ring so that the sheet-shaped recording medium such as the magnetic sheet is positioned in the cartridge on the inner circumference side of the central disk.
本発明は、カートリツジ内でのシート状記録媒体の位置
決めを、中心円板の内周側で行う構造であるから、その
位置決め構造によつて中心円板の外径が規制を受けるこ
とが全くない。従つてシート状記録媒体の外径に対する
中心円板の外径を充分に小さく構成することができる。Since the present invention has a structure in which the sheet-shaped recording medium is positioned inside the cartridge, on the inner peripheral side of the central disk, the positioning structure does not restrict the outer diameter of the central disk at all. . Therefore, the outer diameter of the central disk can be made sufficiently small with respect to the outer diameter of the sheet-shaped recording medium.
以下、本発明をマイクロ・フロツピーデイスクを用いる
デイスクカートリツジに適用した一実施例を第１図及び
第２図によつて説明する。なお第３図〜第５図に示した
従来例と同一構造部には同一の符号を付してその説明を
省略した。An embodiment in which the present invention is applied to a disk cartridge using a micro floppy disk will be described with reference to FIGS. 1 and 2. The same structural parts as those of the conventional example shown in FIGS. 3 to 5 are designated by the same reference numerals and the description thereof is omitted.
先ず、デイスク（マイクロ・フロツピーデイスク）１の
中心円板３６はステンレス等の金属の円形平板で構成さ
れていて、この中心円板３６の上面でほゞ正方形状をな
す中心孔４の外周にはＡＢＳ樹脂等の合成樹脂にて一体
にアウトサート成形された外径が小径Ｄ４のリング３７
が同心円形状に一体に設けられている。またこの中心円
板３６の外周部の上面にもやはりＡＢＳ樹脂等の合成樹
脂にて一体にアウトサート成形されたフランジ３８が同
心円形状に一体に設けられている。そしてシート状記録
媒体である直径３．５インチの磁気シート３９がその中
央に設けられた円形孔４０によつてフランジ３８の内周
部の上面に一体成形されている円筒部３８ａの外周に上
方から嵌合されて、中心円板３６に対する磁気シート３
９のセンター出しを行つた状態で、磁気シート３９の円
形孔周辺部分３９ａがフランジ３８の上面に接着剤４１
による接着等にて固着されている。First, the central disk 36 of the disk (micro-floppy disk) 1 is composed of a circular plate made of metal such as stainless steel, and the upper surface of the central disk 36 is formed on the outer periphery of the central hole 4 having a substantially square shape. Is a ring 37 with a small outer diameter D 4 , which is integrally outsert-molded with a synthetic resin such as ABS resin.
Are integrally provided in a concentric shape. Further, a flange 38, which is integrally outsert-molded with a synthetic resin such as ABS resin, is also provided concentrically and integrally on the upper surface of the outer peripheral portion of the center disk 36. A magnetic sheet 39 having a diameter of 3.5 inches, which is a sheet-shaped recording medium, is upwardly formed on the outer periphery of a cylindrical portion 38a integrally formed on the upper surface of the inner peripheral portion of the flange 38 by a circular hole 40 provided at the center thereof. From the magnetic sheet 3 to the central disc 36
9, the circular hole peripheral portion 39a of the magnetic sheet 39 is attached to the upper surface of the flange 38 with the adhesive 41.
It is fixed by adhesion, etc.
次に、このデイスク１は合成樹脂にて成形された上下ハ
ーフ４２、４３からなるカートリツジ４４内に回転自在
に収納され、中心円板３６は下ハーフ７のターンテーブ
ル挿入孔９内に遊嵌されているが、上ハーフ４２の内面
の中央部には円筒状をなし内径が小径Ｄ５の位置決め用
リブ４５が一体成形されて設けられている。但しＤ４＜
Ｄ５である。そしてこの小径Ｄ５の位置決め用リブ４５
をデイスク１の中心円板３６の小径Ｄ４のリング３７の
外周に嵌合させて、カートリツジ４４内での磁気シート
３９の位置決めを中心円板３６の内周側で行うように構
成している。なお当然のことながら、位置決め用リブ４
５はターンテーブル１５の駆動ピン２３と干渉しない外
径に構成する必要があり、またフランジ３８の内径も中
心円板３６の偏心孔５外側縁より小さくすることはでき
ない。Next, the disk 1 is rotatably accommodated in a cartridge 44 composed of upper and lower halves 42, 43 made of synthetic resin, and the center disk 36 is loosely fitted in the turntable insertion hole 9 of the lower half 7. However, at the center of the inner surface of the upper half 42, a positioning rib 45 having a cylindrical shape and a small inner diameter D 5 is integrally formed and provided. However, D 4 <
It is D 5 . And the positioning rib 45 of this small diameter D 5
Is fitted to the outer circumference of the ring 37 having the small diameter D 4 of the central disk 36 of the disk 1 so that the magnetic sheet 39 is positioned in the cartridge 44 on the inner circumferential side of the central disk 36. . As a matter of course, the positioning rib 4
It is necessary that the outer diameter of the flange 5 does not interfere with the drive pin 23 of the turntable 15, and the inner diameter of the flange 38 cannot be smaller than the outer edge of the eccentric hole 5 of the central disk 36.
以上の如く本発明は、上ハーフ４２の内面に一体成形し
た小径Ｄ５の位置決め用リブ４５で中心円板３６の内周
にアウトサート成形されている小径Ｄ４のリング３７を
外側から位置決めするようにして、カートリツジ４４内
での磁気シート３９の位置決め（センターリング）を中
心円板３６の内周側で行う構造である。As described above, according to the present invention, the positioning rib 45 having a small diameter D 5 integrally formed on the inner surface of the upper half 42 positions the ring 37 having a small diameter D 4 outsert-molded on the inner circumference of the central disk 36 from the outside. In this way, the magnetic sheet 39 is positioned (centered) within the cartridge 44 on the inner peripheral side of the central disk 36.
従つて、本発明によれば、第１図に示す如く、中心円板
３６のフランジ３８の外径Ｄ６を磁気シート３９の外径
（３．５インチ）Ｄ３に対して充分に小さく構成するこ
とができて、中心円板３６のフランジ３８の上面に接着
されて固定されている磁気シート３９の円形孔周辺部分
３９ａにおける固定部分の外径位置Ｐ３と、磁気シート
３９の最内周を記録、再生する両磁気ヘツド２６、２７
の最内周位置Ｐ１（従来と同じ位置）との間に充分に大
きな距離ｌ２を取ることができる。即ち本発明のＤ６、
ｌ２と第５図で示した従来のＤ３、ｌ１との関係は、Ｄ
６＜Ｄ３、ｌ２＞ｌ１であり、Ｄ６とＤ３との差相当分
だけ、ｌ２がｌ１より大きくなつている。Therefore, according to the present invention, as shown in FIG. 1, the outer diameter D 6 of the flange 38 of the central disk 36 is sufficiently smaller than the outer diameter (3.5 inches) D 3 of the magnetic sheet 39. The outer diameter position P 3 of the fixed portion of the circular hole peripheral portion 39a of the magnetic sheet 39, which is fixed to the upper surface of the flange 38 of the central disk 36, and the innermost circumference of the magnetic sheet 39. Both magnetic heads 26, 27 for recording and reproducing
A sufficiently large distance l 2 can be provided between the innermost peripheral position P 1 (the same position as the conventional one ). That is, D 6 of the present invention,
The relationship between l 2 and conventional D 3 and l 1 shown in FIG.
6 <D 3 , l 2 > l 1 , and l 2 is larger than l 1 by the amount corresponding to the difference between D 6 and D 3 .
以上の結果、本発明によれば、磁気シート３９の円形孔
周辺部分３９ａを中心円板３６のフランジ３８の上面に
接着している接着剤４１の厚みのバラツキ等によつて、
磁気シート３９の円形孔周辺部分３９ａの下面３９ｂ
と、磁気シート３９の高さの基準となる下部磁気ヘツド
２７の上面２７ａとの間に段差Ｈ１が発生しても、前記
距離ｌ２が充分に大きいことから、その磁気シート３９
の半径方向における上下の撓みを非常に小さく抑えるこ
とができ、また中心円板３６のフランジ３８と両磁気ヘ
ッド２６、２７との間での磁気シート３９の柔軟性も充
分に確保することができて、磁気シート３９に対する両
磁気ヘツド２６、２７の当り（接触状態）を著しく良く
することができて、トラツキングずれやスペーシングロ
ス等の問題を発生しない。As a result of the above, according to the present invention, due to the variation in the thickness of the adhesive 41 that adheres the circular hole peripheral portion 39a of the magnetic sheet 39 to the upper surface of the flange 38 of the central disk 36,
The lower surface 39b of the circular hole peripheral portion 39a of the magnetic sheet 39
And the step H 1 between the upper surface 27a of the lower magnetic head 27 and the height of the magnetic sheet 39, the distance l 2 is sufficiently large.
Of the magnetic sheet 39 between the flange 38 of the central disk 36 and the magnetic heads 26 and 27 can be sufficiently ensured. Thus, the contact (contact state) of both magnetic heads 26, 27 with respect to the magnetic sheet 39 can be significantly improved, and problems such as tracking deviation and spacing loss do not occur.
以上、本発明の実施例に付き述べたが、本発明は実施例
に限定されることなく、本発明の技術的思想に基づいて
各種の有効な変更が可能である。Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments and various effective modifications can be made based on the technical idea of the present invention.
例えば、実施例に示したように、リング３７を中心円板
３６に必ずしもアウトサート成形する必要はなく、接
着、溶着或いはビス止め等するものであつても良い。For example, as shown in the embodiment, the ring 37 does not necessarily need to be outsert-molded on the central disk 36, and may be bonded, welded, screwed, or the like.
またシート状記録媒体は磁気シート以外のものであつて
も良い。Further, the sheet-shaped recording medium may be other than the magnetic sheet.
また本発明は、マイクロ・フロツピーデイスクを用いる
デイスクカートリツジに限定されることなく、シート状
記録媒体を用いて各種の方式で記録、再生する各種のデ
イスクカートリツジに適用可能である。Further, the present invention is not limited to the disc cartridge which uses the micro-floppy disc, but can be applied to various disc cartridges which record and reproduce by various methods using a sheet-shaped recording medium.
本発明は、磁気シート等のシート状記録媒体の外径を従
来と同じにしたまゝで、その外径に対する中心円板の外
径を充分に小さく構成することができるものであるか
ら、記録、再生時におけるシート状記録媒体に対する磁
気ヘツド等の録再用ヘツドの当りを従来に比べて著しく
良くすることができて、トラツキングずれやスペーシン
グロス等の問題を発生せず、記録、再生の精度を著しく
向上させることができる。そして本発明によれば、特に
２ＭＢ用（高密度記録用）のマイクロ・フロツピーデイ
スクに最適なものである。According to the present invention, since the outer diameter of the sheet-shaped recording medium such as a magnetic sheet is the same as the conventional one, and the outer diameter of the central disk can be made sufficiently small with respect to the outer diameter. The recording / reproducing head such as a magnetic head can be remarkably improved in hitting the sheet-shaped recording medium during reproduction as compared with the conventional one, and the recording / reproducing head can be reproduced without causing problems such as tracking deviation and spacing loss. The accuracy can be significantly improved. And according to the present invention, it is particularly suitable for a micro floppy disc for 2 MB (for high density recording).
第１図及び第２図は本発明の一実施例を示したものであ
つて、第１図は要部の拡大断面図、第２図は要部の斜視
図である。 第３図〜第５図は従来例を示したものであつて、第３図
は全体の斜視図、第４図は要部の断面図、第５図は要部
の拡大断面図である。 また図面に用いられた符号において、 ４……中心孔 ５……偏心孔 ９……ターンテーブル挿入孔 ３６……中心円板 ３７……リング ３８……フランジ ３９……磁気シート ４２……上ハーフ ４３……下ハーフ ４４……カートリツジ ４５……位置決め用リブ である。1 and 2 show an embodiment of the present invention. FIG. 1 is an enlarged cross-sectional view of a main part, and FIG. 2 is a perspective view of the main part. 3 to 5 show a conventional example, FIG. 3 is a perspective view of the whole, FIG. 4 is a sectional view of a main part, and FIG. 5 is an enlarged sectional view of the main part. In the reference numerals used in the drawings, 4 ... central hole 5 ... eccentric hole 9 ... turntable insertion hole 36 ... central disk 37 ... ring 38 ... flange 39 ... magnetic sheet 42 ... upper half 43 ... Lower half 44 ... Cartridge 45 ... Positioning rib.
Claims (1)
心孔とを有する中心円板の外周にシート状記録媒体を固
着し、このシート状記録媒体を上下ハーフからなるカー
トリツジ内に回転自在に収納させ、中心円板を下ハーフ
に設けたターンテーブル挿入孔内に遊嵌させてあるデイ
スクカートリツジにおいて、 前記中心円板の上面で前記ほゞ正方形状の中心孔の外周
に同心円形状の小径のリングを一体に設け、 前記上ハーフの内面に一体成形した小径の位置決め用リ
ブを前記リングの外周に嵌合させて、前記カートリツジ
内での前記シート状記録媒体の位置決めを前記中心円板
の内周側で行うように構成したことを特徴とするデイス
クカートリツジ。1. A sheet-shaped recording medium is fixed to the outer periphery of a central disk having a substantially square-shaped central hole and a substantially rectangular-shaped eccentric hole, and the sheet-shaped recording medium is placed in a cartridge which is composed of upper and lower halves. In a disc cartridge which is rotatably housed and has a center disk loosely fitted in a turntable insertion hole provided in the lower half, a concentric circle is formed on the upper surface of the center disk around the outer periphery of the substantially square center hole. A small-diameter ring of a shape is integrally provided, and a small-diameter positioning rib integrally formed on the inner surface of the upper half is fitted to the outer periphery of the ring to center the positioning of the sheet-shaped recording medium in the cartridge. A disk cartridge which is configured to be performed on the inner peripheral side of the disc.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60211976A JPH0634323B2 (en) | 1985-09-25 | 1985-09-25 | Disco Cartridge |
| CA000518493A CA1284380C (en) | 1985-09-25 | 1986-09-18 | Disk cartridge |
| KR1019860007930A KR960004071B1 (en) | 1985-09-25 | 1986-09-23 | Magnetic disk cartridge with improved center plate for disk mounting |
| EP86402089A EP0216708B1 (en) | 1985-09-25 | 1986-09-24 | Disk cartridge |
| AT86402089T ATE74462T1 (en) | 1985-09-25 | 1986-09-24 | DISK CASSETTE. |
| SG1995903779A SG30549G (en) | 1985-09-25 | 1986-09-24 | Disk cartridge |
| DE8686402089T DE3684651D1 (en) | 1985-09-25 | 1986-09-24 | DISK CASSETTE. |
| AU63092/86A AU593579B2 (en) | 1985-09-25 | 1986-09-24 | Disk cartridge |
| US07/212,025 US4812937A (en) | 1985-09-25 | 1988-06-23 | Magnetic disk cartridge with improved center plate for disk mounting |
| HK101695A HK101695A (en) | 1985-09-25 | 1995-06-22 | Disk cartridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60211976A JPH0634323B2 (en) | 1985-09-25 | 1985-09-25 | Disco Cartridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6273477A JPS6273477A (en) | 1987-04-04 |
| JPH0634323B2 true JPH0634323B2 (en) | 1994-05-02 |
Family
ID=16614823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60211976A Expired - Fee Related JPH0634323B2 (en) | 1985-09-25 | 1985-09-25 | Disco Cartridge |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4812937A (en) |
| EP (1) | EP0216708B1 (en) |
| JP (1) | JPH0634323B2 (en) |
| AT (1) | ATE74462T1 (en) |
| AU (1) | AU593579B2 (en) |
| CA (1) | CA1284380C (en) |
| DE (1) | DE3684651D1 (en) |
| HK (1) | HK101695A (en) |
| SG (1) | SG30549G (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH064466Y2 (en) * | 1989-03-07 | 1994-02-02 | 花王株式会社 | Magnetic disk cartridge |
| JP3036108B2 (en) * | 1991-04-25 | 2000-04-24 | ソニー株式会社 | Disk cartridge |
| JP3063262B2 (en) * | 1991-07-31 | 2000-07-12 | ソニー株式会社 | Disk cartridge |
| AU662745B2 (en) * | 1991-07-31 | 1995-09-14 | Sony Corporation | Disc cartridge |
| DE69232492T2 (en) * | 1991-12-07 | 2002-11-28 | Minebea K.K., Nagano | Motor for starting a plate |
| US5815344A (en) * | 1992-02-17 | 1998-09-29 | Sony Corporation | Disc cartridge loading apparatus |
| JP2616529B2 (en) * | 1992-04-13 | 1997-06-04 | 松下電器産業株式会社 | Injection mold for disk with hub, disk cartridge and disk substrate |
| US5437404A (en) * | 1993-07-13 | 1995-08-01 | Illinois Tool Works Inc. | Adjustable shear block assembly |
| JPH08308197A (en) * | 1995-05-08 | 1996-11-22 | Matsushita Electric Ind Co Ltd | Spindle motor |
| JPH097333A (en) * | 1995-06-23 | 1997-01-10 | Fuji Photo Film Co Ltd | Magnetic disk cartridge |
| JPH09147513A (en) * | 1995-11-22 | 1997-06-06 | Sony Corp | Disk cartridge |
| JPH11149739A (en) * | 1997-11-14 | 1999-06-02 | Sony Corp | Disk cartridge |
| JP2001035115A (en) * | 1999-07-22 | 2001-02-09 | Fuji Photo Film Co Ltd | Center core for magnetic disk |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4194228A (en) * | 1978-10-11 | 1980-03-18 | Magnetic Peripherals Inc. | Magnetic disc housing with means to prevent radial disc shift |
| JPS56137555A (en) * | 1980-03-27 | 1981-10-27 | Sony Corp | Optical disc cassette and disc driving method |
| JPS606938Y2 (en) * | 1980-08-14 | 1985-03-07 | ソニー株式会社 | Disc cassette for recording and playback |
| JPS6245356Y2 (en) * | 1981-06-05 | 1987-12-03 | ||
| JPS5950034U (en) * | 1982-09-21 | 1984-04-03 | ソニー株式会社 | Information record sheet |
| JPS6035385A (en) * | 1983-08-03 | 1985-02-23 | Hitachi Maxell Ltd | Disk cartridge |
| US4586102A (en) * | 1983-08-04 | 1986-04-29 | Eastman Kodak Company | Track number indicator |
| US4571718A (en) * | 1984-07-11 | 1986-02-18 | Eastman Kodak Company | Optical disk cartridge and cooperating apparatus |
| NL8402602A (en) * | 1984-08-27 | 1986-03-17 | Philips Nv | DISC CASSETTE. |
| JPS61129721A (en) * | 1984-11-27 | 1986-06-17 | Nagaoka:Kk | Head cleaning device |
-
1985
- 1985-09-25 JP JP60211976A patent/JPH0634323B2/en not_active Expired - Fee Related
-
1986
- 1986-09-18 CA CA000518493A patent/CA1284380C/en not_active Expired - Lifetime
- 1986-09-24 EP EP86402089A patent/EP0216708B1/en not_active Expired - Lifetime
- 1986-09-24 AU AU63092/86A patent/AU593579B2/en not_active Ceased
- 1986-09-24 AT AT86402089T patent/ATE74462T1/en not_active IP Right Cessation
- 1986-09-24 SG SG1995903779A patent/SG30549G/en unknown
- 1986-09-24 DE DE8686402089T patent/DE3684651D1/en not_active Expired - Lifetime
-
1988
- 1988-06-23 US US07/212,025 patent/US4812937A/en not_active Expired - Lifetime
-
1995
- 1995-06-22 HK HK101695A patent/HK101695A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ATE74462T1 (en) | 1992-04-15 |
| AU6309286A (en) | 1987-03-26 |
| AU593579B2 (en) | 1990-02-15 |
| EP0216708A2 (en) | 1987-04-01 |
| DE3684651D1 (en) | 1992-05-07 |
| EP0216708A3 (en) | 1988-09-21 |
| JPS6273477A (en) | 1987-04-04 |
| SG30549G (en) | 1995-09-18 |
| EP0216708B1 (en) | 1992-04-01 |
| US4812937A (en) | 1989-03-14 |
| CA1284380C (en) | 1991-05-21 |
| HK101695A (en) | 1995-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |